lextest.l

   1 %{
   2 #include <stdio.h>
   3 %}
   4
   5 %%
   6 "Integer"               printf("T_INTEGER ");
   7 "Var"                   printf("T_VAR ");
   8 "Begin"                 printf("T_BEGIN ");
   9 "End"                   printf("T_END ");
  10 "Procedure"             printf("T_PROCEDURE ");
  11 "Function"              printf("T_FUNCTION ");
  12
  13 "*"                     printf("T_MULT ");
  14 "/"                     printf("T_DIV ");
  15 "+"                     printf("T_ADD ");
  16 "-"                     printf("T_SUB ");
  17 ":="                    printf("T_ATTRIBUTION ");
  18 ";"                     printf("T_SEMICOLON ");
  19 ":"                     printf("T_COLON ");
  20 "."                     printf("T_DOT ");
  21
  22 [0-9]+                  printf("NUMBER ");
  23 [A-Za-z][A-Za-z0-9]*    printf("IDENTIFIER ");
  24
  25 [ \t]+                  /* ignora whitespace */;
  26 \n                      printf("\n");
  27 %%
  28